I want to enable google bbr on my VPS. But I don't know this feature is integrated on linux kernel or not. How can I check it?


You can check your system conf by command sysctl -a.
By using sysctl -a | grep tcp_congestion_control command, your can check your current tcp_congestion_control algorithm.

If your system supported bbr, the result will like this: net.ipv4.tcp_congestion_control = bbr


Below command used to find the available tcp congestion control algorithms supported.

1. cat /proc/sys/net/ipv4/tcp_available_congestion_control

bic reno cubic

2. This command used to find which tcp congestion control configured for your Linux.

sysctl net.ipv4.tcp_congestion_control

3. Below command is used to change to desired one from the available list.

sysctl -w net.ipv4.tcp_congestion_control=bic
sysctl net.ipv4.tcp_available_congestion_control
  • Do you mind expanding on this answer a bit so that it is more clear for anyone that stumbles across this thread in the future? – jesse_b Dec 20 '17 at 17:02

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